Originally Posted By: CapriRacer
Just so everyone understands:
ST tires have as part of the tire standard a speed limitation of 65 mph. As a tire engineer, I take that to mean that the load/speed/inflation pressure relationship - the physics of the situation - mean the tire is bound by the laws of physics to 65 mph and the load table as published.
HOWEVER, I am willing to concede that a tire manufacturer COULD produce a tire that has a higher speed capability than the standards call for.
So, yes, I think that trailer tires are unsafe at speeds above 65 mph unless the inflation pressure and loads to adjusted according to the tire standard - AND - the buying public is ill served by this situation.
The Carlisle HD I'm looking into has an M (81 MPH) speed rating. I don't tow at 80 but do regularly at 70.
Photo and info on Discount Tire site.